The Web Publishing feature in Netscape Enterprise Server 4.x and earlier allows remote attackers to list arbitrary directories under the web server root via the INDEX command.
https://exchange.xforce.ibmcloud.com/vulnerabilities/5997
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-0250
http://www.securityfocus.com/bid/2285
http://archives.neohapsis.com/archives/bugtraq/2001-01/0396.html